Facing troubles installing rubymine latest one in vps ubuntu 12.04 64 bit

Hi all,

I have installed Redmine latest one in my vps. I am facing the below error

apt-get install redmine redmine-mysql
Reading package lists… Done
Building dependency tree
Reading state information… Done
Suggested packages:
libsvn-ruby ruby-rmagick libopenid-ruby
The following NEW packages will be installed:
redmine redmine-mysql
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/3,990 kB of archives.
After this operation, 10.8 MB of additional disk space will be used.
Preconfiguring packages …
Selecting previously unselected package redmine-mysql.
(Reading database … 98691 files and directories currently installed.)
Unpacking redmine-mysql (from …/redmine-mysql_1.3.2+dfsg1-1ubuntu1_all.deb) …
Selecting previously unselected package redmine.
Unpacking redmine (from …/redmine_1.3.2+dfsg1-1ubuntu1_all.deb) …
Setting up redmine-mysql (1.3.2+dfsg1-1ubuntu1) …
Setting up redmine (1.3.2+dfsg1-1ubuntu1) …
dbconfig-common: writing config to /etc/dbconfig-common/redmine/instances/default.conf

Creating config file /etc/dbconfig-common/redmine/instances/default.conf with new version

Creating config file /etc/redmine/default/database.yml.new with new version
granting access to database redmine_default for redmine@localhost: success.
verifying access for redmine@localhost: success.
creating database redmine_default: success.
verifying database redmine_default exists: success.
dbconfig-common: flushing administrative password

Creating config file /etc/redmine/default/database.yml with new version
rake aborted!
undefined method `map’ for nil:NilClass
(See full trace by running task with --trace)
dpkg: error processing redmine (–configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

the below is the Rakefile
require(File.join(File.dirname(FILE), ‘config’, ‘boot’))

require ‘rake’
require ‘rake/testtask’

require ‘rdoc/task’
rescue LoadError

RDoc is not available


require ‘tasks/rails’ this is the 15th line.

Kindly let me know where is the issue.

Thanks in advance